1) Facebook introduced Pages in 2009 to allow brands to connect with users in a way that worked better than previous methods. Over time, features like tabs, apps, and wall-like interactions were added. 2) The 2012 introduction of Timeline changed the layout significantly, focusing more on user input and interaction. It removed features like default landing tabs and auto-refresh that brands had previously used. 3) Brands now need to adapt their Pages by optimizing content for the new Timeline format and removing outdated elements like fangates in favor of user engagement in tabs and pinned posts.